Specifications

16
TC/TM Governor Adjustment
Three different styles of governor systems are used on
TC/TM engines. Use the following illustrations (diags.
2 and 3) to identify the governor system used and the
following procedure to adjust the governed engine
speed.
1. Allow the engine to run for at least 5 minutes to
reach the operating temperature. Make sure the air
filter (if equipped) is clean and the choke is in the off
position.
2. Using a Vibratach (part #670156) or other
tachometer, determine the engine's R.P.M at idle
and wide open throttle. Consult microfiche card
#30 or the computer parts lookup to obtain the
recommended engine speeds.
3. Using the applicable illustration, either bend the
speed adjusting lever toward the spark plug end of
the engine to decrease high speed R.P.M., or bend
the lever in opposite direction to increase R.P.M.
On TC Type II/TM engines, turn the speed adjusting
screw out to increase or in to decrease engine high
speed R.P.M. If the speed adjustment screw is
turned out to increase the engine R.P.M., the speed
control lever must be moved to allow the speed
control plunger to contact the speed adjustment
screw.
4. The low speed is set by moving the throttle control
to the lowest speed position and adjusting the low
speed adjustment screw on the carburetor.
Speed
Adjusting
Lever
Speed
Adjusting
Lever
TC TYPE I
TC TYPE I and
EARLY TC TYPE II
2
Spring Hooked
In Notch
Spring Hooked
In Notch
Decrease Increase
TYPE II
3
Adjust governed high speed with speed control
plunger pulled back against speed adjustment
screw
Decrease (IN)
Increase (OUT)
Speed Adjusting Screw
Spring Color Spring Position
Orange or Green 1
Pink, Red, or Black 2
Spring Position 1
Spring Position 2
Speed Adjusting Screw
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For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983